54777631640 has 32 divisors (see below), whose sum is σ = 123257922480. Its totient is φ = 21909585792.

The previous prime is 54777631639. The next prime is 54777631729. The reversal of 54777631640 is 4613677745.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715034 + ... + 787926.

Almost surely, 2^54777631640 is an apocalyptic number.

It is an amenable number.

54777631640 is an abundant number, since it is smaller than the sum of its proper divisors (68480290840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54777631640 is a wasteful number, since it uses less digits than its factorization.

54777631640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91691 (or 91687 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 54777631640 in words is "fifty-four billion, seven hundred seventy-seven million, six hundred thirty-one thousand, six hundred forty".